Product Description
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Hardware Architecture
The following sections provide an overview of the system configurations on which WebLogic Network Gatekeeper runs:
Overview
An WebLogic Network Gatekeeper consists of two or more UNIX servers and is fully scalable to fit all capacity needs. The UNIX servers are connected through switches. High availability is achieved through duplication of all critical hardware.
Note: This chapter describes the hardware architecture on a general level. For detailed site specific more information, see the deplyment-specific documentation.
Configuration
A configuration consists of a number of UNIX servers connected through switches. The number of servers is determined by the WebLogic Network Gatekeeper capacity needs.
Applications and networks are connected to WebLogic Network Gatekeeper through the switches. A network time server can be used to synchronize the time between the UNIX servers. An example configuration with four servers is shown in Figure 14-1.
For security reasons, the two servers used for the application access are separated from the network access servers. The application access servers reside in a De-militarized Zone (DMZ) while the network access servers are in the trusted environment.
High availability
All hardware is duplicated. This eliminates single point of failure on critical hardware components.
Scalability
The number of servers in an WebLogic Network Gatekeeper configuration is scalable from two up to 256 servers. Adding new servers is made in run-time without restarting the WebLogic Network Gatekeeper.
Individual servers can, depending on type, be upgraded with more CPUs, RAM, disk capacity and so on.
